Definition of hub noun from the Oxford Advanced Learner's Dictionary

     

    hub

     noun
    noun
    BrE BrE//hʌb//
     
    ; NAmE NAmE//hʌb//
     
     
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  1. 1[usually singular] hub (of something) the central and most important part of a particular place or activity the commercial hub of the city The kitchen was the hub of family life. to be at the hub of things (= where things happen and important decisions are made) a hub airport (= a large important one where people often change from one plane to another)
  2. 2the central part of a wheel
  3. Word Origin early 16th cent. (denoting a shelf at the side of a fireplace used for heating pans): of unknown origin (compare with hob).
See the Oxford Advanced American Dictionary entry: hub